package com.util;



import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;


/**
 * 导出Excel公共方法
 * @version 1.0
 *
 * @author wangjun
 *
 */
public class ExportExcel{
 
    //显示的导出表的标题
    private String title;
    //导出表的列名
    private String[] rowName ;
 
    private List<Object[]>  dataList = new ArrayList<Object[]>();
 

    //构造方法，传入要导出的数据
    public ExportExcel(String title,String[] rowName,List<Object[]>  dataList){
        this.dataList = dataList;
        this.rowName = rowName;
        this.title = title;
    }
 
    /*
     * 导出数据
     * */
    public void export(HSSFWorkbook workbook, HSSFSheet sheet, int x) throws Exception{
        try{
 
            // 产生表格标题行
            HSSFRow rowm = sheet.createRow(0);
            HSSFCell cellTiltle = rowm.createCell(0);
 
            rowm.setHeight((short) (25 * 35)); //设置高度
 
            //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面  - 可扩展】
            HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象
            HSSFCellStyle style = this.getStyle(workbook);                    //单元格样式对象
 
            sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, (rowName.length-1)));
            cellTiltle.setCellStyle(columnTopStyle);
            cellTiltle.setCellValue(title);
 
            // 定义所需列数
            int columnNum = rowName.length;
            HSSFRow rowRowName = sheet.createRow(1);                // 在索引2的位置创建行(最顶端的行开始的第二行)
 
            rowRowName.setHeight((short) (25 * 25)); //设置高度
 
            // 将列头设置到sheet的单元格中
            for(int n=0;n<columnNum;n++){
                HSSFCell  cellRowName = rowRowName.createCell(n);                //创建列头对应个数的单元格
                cellRowName.setCellType(CellType.STRING);                //设置列头单元格的数据类型
                HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
                cellRowName.setCellValue(text);                                    //设置列头单元格的值
                cellRowName.setCellStyle(columnTopStyle);                        //设置列头单元格样式
            }
 
            //将查询出的数据设置到sheet对应的单元格中
            for(int i=0;i<dataList.size();i++){
 
                Object[] obj = dataList.get(i);//遍历每个对象
                HSSFRow row = sheet.createRow(i+2);//创建所需的行数
 
                row.setHeight((short) (25 * 20)); //设置高度
 
                for(int j=0; j<obj.length; j++){
                    HSSFCell  cell = null;   //设置单元格的数据类型
                    if(j == 0){
                        cell = row.createCell(j,CellType.NUMERIC);
                        cell.setCellValue(i+1);
                    }else{
                        cell = row.createCell(j,CellType.STRING);
                        if(!"".equals(obj[j]) && obj[j] != null){
                            cell.setCellValue(obj[j].toString());                        //设置单元格的值
                        }
                    }
                    cell.setCellStyle(style);                                    //设置单元格样式
                }
            }
            //让列宽随着导出的列长自动适应
            for (int colNum = 0; colNum < columnNum; colNum++) {
                int columnWidth = sheet.getColumnWidth(colNum) / 256;
                for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
                    HSSFRow currentRow;
                    //当前行未被使用过
                    if (sheet.getRow(rowNum) == null) {
                        currentRow = sheet.createRow(rowNum);
                    } else {
                        currentRow = sheet.getRow(rowNum);
                    }
                    if (currentRow.getCell(colNum) != null) {
                        HSSFCell currentCell = currentRow.getCell(colNum);
                        if (currentCell.getCellType() == CellType.STRING) {
                            int length = currentCell.getStringCellValue().getBytes().length;
                            if (columnWidth < length) {
                                columnWidth = length;
                            }
                        }
                    }
                }
                if(colNum == 0){
                    sheet.setColumnWidth(colNum, (columnWidth-2) * 128);
                }else{
                    sheet.setColumnWidth(colNum, (columnWidth+4) * 256);
                }
            }
 
            if(workbook !=null&&x==1){
                try
                {
//                    String fileName = "Excel-" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";
//                    String headStr = "attachment; filename=\"" + fileName + "\"";
//                    response = getResponse();
//                    response.setContentType("APPLICATION/OCTET-STREAM");
//                    response.setHeader("Content-Disposition", headStr);
//                    OutputStream out = response.getOutputStream();
//                    workbook.write(out);
                    FileOutputStream out = new FileOutputStream("excel\\file\\" + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()).toString() +".xls");
                    workbook.write(out);
                    out.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
 
        }catch(Exception e){
            e.printStackTrace();
        }
 
    }
 
    /*
     * 列头单元格样式
     */
    public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
 
        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        font.setFontHeightInPoints((short)11);
        //字体加粗
        font.setBold(true);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(BorderStyle.THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置左边框;
        style.setBorderLeft(BorderStyle.THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置右边框;
        style.setBorderRight(BorderStyle.THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置顶边框;
        style.setBorderTop(BorderStyle.THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HorizontalAlignment.CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(VerticalAlignment.CENTER);
 
        //设置单元格背景颜色
        style.setFillForegroundColor(IndexedColors.PALE_BLUE.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
 
        return style;
 
    }
 
    /*
     * 列数据信息单元格样式
     */
    public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        //font.setFontHeightInPoints((short)10);
        //字体加粗
        //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(BorderStyle.THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置左边框;
        style.setBorderLeft(BorderStyle.THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置右边框;
        style.setBorderRight(BorderStyle.THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //设置顶边框;
        style.setBorderTop(BorderStyle.THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HorizontalAlignment.CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(VerticalAlignment.CENTER);
 
        return style;
    }
}
